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[PATCH v3 2.6.39-rc1-tip 17/26] 17: uprobes: register a notifier for uprobes.
- From: Srikar Dronamraju <srikar at linux dot vnet dot ibm dot com>
- To: Peter Zijlstra <peterz at infradead dot org>, Ingo Molnar <mingo at elte dot hu>
- Cc: Steven Rostedt <rostedt at goodmis dot org>, Srikar Dronamraju <srikar at linux dot vnet dot ibm dot com>, Linux-mm <linux-mm at kvack dot org>, Arnaldo Carvalho de Melo <acme at infradead dot org>, Linus Torvalds <torvalds at linux-foundation dot org>, Masami Hiramatsu <masami dot hiramatsu dot pt at hitachi dot com>, Ananth N Mavinakayanahalli <ananth at in dot ibm dot com>, Christoph Hellwig <hch at infradead dot org>, Andi Kleen <andi at firstfloor dot org>, Thomas Gleixner <tglx at linutronix dot de>, Jonathan Corbet <corbet at lwn dot net>, Oleg Nesterov <oleg at redhat dot com>, LKML <linux-kernel at vger dot kernel dot org>, Jim Keniston <jkenisto at linux dot vnet dot ibm dot com>, Roland McGrath <roland at hack dot frob dot com>, SystemTap <systemtap at sources dot redhat dot com>, Andrew Morton <akpm at linux-foundation dot org>
- Date: Fri, 01 Apr 2011 20:05:48 +0530
- Subject: [PATCH v3 2.6.39-rc1-tip 17/26] 17: uprobes: register a notifier for uprobes.
- References: <20110401143223.15455.19844.sendpatchset@localhost6.localdomain6>
Uprobe needs to be intimated on int3 and singlestep exceptions.
Hence uprobes registers a die notifier so that its notified of the events.
Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
---
kernel/uprobes.c | 18 ++++++++++++++++++
1 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/kernel/uprobes.c b/kernel/uprobes.c
index e0ff6ba..cdd52d0 100644
--- a/kernel/uprobes.c
+++ b/kernel/uprobes.c
@@ -33,6 +33,7 @@
#include <linux/rmap.h> /* needed for anon_vma_prepare */
#include <linux/mman.h> /* needed for PROT_EXEC, MAP_PRIVATE */
#include <linux/file.h> /* needed for fput() */
+#include <linux/kdebug.h> /* needed for notifier mechanism */
#define UINSNS_PER_PAGE (PAGE_SIZE/UPROBES_XOL_SLOT_BYTES)
#define MAX_UPROBES_XOL_SLOTS UINSNS_PER_PAGE
@@ -1387,3 +1388,20 @@ int uprobe_post_notifier(struct pt_regs *regs)
}
return 0;
}
+
+struct notifier_block uprobes_exception_nb = {
+ .notifier_call = uprobes_exception_notify,
+ .priority = 0x7ffffff0,
+};
+
+static int __init init_uprobes(void)
+{
+ return register_die_notifier(&uprobes_exception_nb);
+}
+
+static void __exit exit_uprobes(void)
+{
+}
+
+module_init(init_uprobes);
+module_exit(exit_uprobes);